The sun sets over a small bay with fishing and pleasure crafts at anchor, taken on Mahe island, Seychelles, Friday March 1, 2019. After months of preparation, scientists are about to set off on a mission to explore the depths of the Indian Ocean, one of the planet's last great unexplored frontiers. Here's a look at what the Nekton Mission hopes to achieve and why the people of the Seychelles, the first stop on this three-year expedition, are excited about its launch. (AP Photo/David Keyton)

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